Hit Products HDC Controller - Manual (Page 7)

6
SENSOR WIRING
7
DEFAULT PROGRAM, POWER
FAILURE, LOW BATTERY OR
NO BATTERY INSTALLED
The controller does not require a default program after
a power outage. The controller has non-volatile memory
to retain your custom program. Four AAA Alkaline bat-
teries maintain the real time clock and calendar.
(Batteries should be changed annually.)
Should there not be sufficient battery power to maintain
the real time clock and calendar and there is a power
outage; when the electrical power returns, the controller
will default to midnight and Saturday.